/**
 * Created by PanJiaChen on 16/11/18.
 */

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime(time, cFormat) {
  if (arguments.length === 0 || !time) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string')) {
      if ((/^[0-9]+$/.test(time))) {
        // support "1548221490638"
        time = parseInt(time)
      } else {
        // support safari
        // https://stackoverflow.com/questions/4310953/invalid-date-in-safari
        time = time.replace(new RegExp(/-/gm), '/')
      }
    }

    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{([ymdhisa])+}/g, (result, key) => {
    const value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value] }
    return value.toString().padStart(2, '0')
  })
  return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time, option) {
  if (('' + time).length === 10) {
    time = parseInt(time) * 1000
  } else {
    time = +time
  }
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return (
      d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
    )
  }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
  const search = decodeURIComponent(url.split('?')[1]).replace(/\+/g, ' ')
  if (!search) {
    return {}
  }
  const obj = {}
  const searchArr = search.split('&')
  searchArr.forEach(v => {
    const index = v.indexOf('=')
    if (index !== -1) {
      const name = v.substring(0, index)
      const val = v.substring(index + 1, v.length)
      obj[name] = val
    }
  })
  return obj
}



export function debounce(func, wait, immediate) {
  let timeout, args, context, timestamp, result

  const later = function () {
    // 据上一次触发时间间隔
    const last = +new Date() - timestamp

    // 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
    if (last < wait && last > 0) {
      timeout = setTimeout(later, wait - last)
    } else {
      timeout = null
      // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
      if (!immediate) {
        result = func.apply(context, args)
        if (!timeout) context = args = null
      }
    }
  }

  return function (...args) {
    context = this
    timestamp = +new Date()
    const callNow = immediate && !timeout
    // 如果延时不存在，重新设定延时
    if (!timeout) timeout = setTimeout(later, wait)
    if (callNow) {
      result = func.apply(context, args)
      context = args = null
    }

    return result
  }
}


/**
 * @param {date} time 需要转换的时间
 * @param {String} fmt 需要转换的格式 如 yyyy-MM-dd、yyyy-MM-dd HH:mm:ss
 */
export function formatTimeS(time, fmt) {
  if (!time) return ''
  else {
    const date = new Date(time)
    const o = {
      'M+': date.getMonth() + 1,
      'd+': date.getDate(),
      'H+': date.getHours(),
      'm+': date.getMinutes(),
      's+': date.getSeconds(),
      'q+': Math.floor((date.getMonth() + 3) / 3),
      S: date.getMilliseconds(),
    }
    if (/(y+)/.test(fmt))
      fmt = fmt.replace(
        RegExp.$1,
        (date.getFullYear() + '').substr(4 - RegExp.$1.length),
      )
    for (const k in o) {
      if (new RegExp('(' + k + ')').test(fmt)) {
        fmt = fmt.replace(
          RegExp.$1,
          RegExp.$1.length === 1 ?
            o[k] :
            ('00' + o[k]).substr(('' + o[k]).length),
        )
      }
    }
    return fmt
  }
}



/**
 * 生成随机数组，指定长度
 */
export function randomArray(length) {
  let i = 0
  let index = 0
  let temp = null
  let arr = [length]
  length = typeof (length) === 'undefined' ? 9 : length
  for (i = 1; i <= length; i++) {
    arr[i - 1] = i
  }
  for (i = 1; i <= length; i++) {
    index = window.parseInt(Math.random() * (length - i)) + i
    if (index != i) {
      temp = arr[i - 1]
      arr[i - 1] = arr[index - 1]
      arr[index - 1] = temp
    }
  }
  return arr
}
//指定数组 长度，数值 为0
export function randomArrayZero(length) {
  let i = 0
  let index = 0
  let temp = null
  let arr = [length]
  length = typeof (length) === 'undefined' ? 9 : length
  for (i = 1; i <= length; i++) {
    arr[i - 1] = 0
  }
  for (i = 1; i <= length; i++) {
    index = window.parseInt(Math.random() * (length - i)) + i
    if (index != i) {
      temp = arr[i - 1]
      arr[i - 1] = arr[index - 1]
      arr[index - 1] = temp
    }
  }
  return arr
}

/**
 * 获取两个日期间的所有日期
 */

//获取两日期之间日期列表函数
export function getdiffdate(stime, etime) {
  //初始化日期列表，数组
  var diffdate = new Array();
  var i = 0;
  //开始日期小于等于结束日期,并循环
  while (stime <= etime) {
    diffdate[i] = stime;

    //获取开始日期时间戳
    var stime_ts = new Date(stime).getTime();
    //增加一天时间戳后的日期
    var next_date = stime_ts + (24 * 60 * 60 * 1000);

    //拼接年月日，这里的月份会返回（0-11），所以要+1
    var next_dates_y = new Date(next_date).getFullYear() + '-';
    var next_dates_m = (new Date(next_date).getMonth() + 1 < 10) ? '0' + (new Date(next_date).getMonth() + 1) + '-' : (new Date(next_date).getMonth() + 1) + '-';
    var next_dates_d = (new Date(next_date).getDate() < 10) ? '0' + new Date(next_date).getDate() : new Date(next_date).getDate();

    stime = next_dates_y + next_dates_m + next_dates_d;

    //增加数组key
    i++;
  }
  return diffdate;
}


/**
 * 计算两个日期之间的天数
 * @param dateString1  开始日期 yyyy-MM-dd
 * @param dateString2  结束日期 yyyy-MM-dd
 * @returns {number} 如果日期相同 返回一天 开始日期大于结束日期，返回0
 */
export function getDaysBetween(dateString1, dateString2) {
  var startDate = Date.parse(dateString1);
  var endDate = Date.parse(dateString2);
  if (startDate > endDate) {
    return 0;
  }
  if (startDate == endDate) {
    return 1;
  }
  var days = (endDate - startDate) / (1 * 24 * 60 * 60 * 1000);
  return days;
}

//生成从minNum到maxNum的随机数
export function randomNum(minNum, maxNum) {
  switch (arguments.length) {
    case 1:
      return parseInt(Math.random() * minNum + 1, 10);
      break;
    case 2:
      return parseInt(Math.random() * (maxNum - minNum + 1) + minNum, 10);
      break;
    default:
      return 0;
      break;
  }
}
//获取最近 天数
export function getDays(days) {
  if (days == '' || days == null || days == undefined || typeof days != "number") {
    return false;
  }
  var res = [];//返回数据
  var today = new Date().getTime();//今天
  for (var i = 0; i < days; i++) {
    var _day = new Date(today - 86400000 * i),
      year = _day.getFullYear(),
      month = (_day.getMonth() + 1),
      day = _day.getDate();
    month < 10 ? '0' + month : month;
    day < 10 ? '0' + day : day;
    res.unshift(month + '.' + day);
    // res.unshift( year + '-' + month + '-' + day);
  }
  return res;
}
//最近几年
export function getYears(year) {
  if (year == '' || year == null || year == undefined || typeof year != "number") {
    return false;
  }
  var res = [];//返回数据
  var toyear = new Date().getFullYear();
  for (var i = 0; i < year; i++) {
    res.unshift(toyear);
    toyear -= 1
  }
  return res;
}

// 文件类型
export function getFileType(val) {
  if (val.indexOf('pdf') > -1) {
    return 'PDF'
  } else if (val.indexOf('doc') > -1 || val.indexOf('docx') > -1) {
    return 'Word'
  } else if (val.indexOf('xsl') > -1 || val.indexOf('xslx') > -1) {
    return 'Excel'
  } else if (val.indexOf('zip') > -1) {
    return 'ZIP'
  } else if (val.indexOf('pptx') > -1 || val.indexOf('ppt') > -1) {
    return 'PPT'
  } else if (val.indexOf('mp3') > -1) {
    return 'MP3'
  } else if (val.indexOf('mp4') > -1) {
    return 'MP4'
  } else if (val.indexOf('txt') > -1) {
    return 'TXT'
  } else if (val.indexOf('rar') > -1) {
    return 'RAR'
  } else if (val.indexOf('jpeg') > -1 || val.indexOf('jpg') > -1) {
    return 'JPG'
  } else {
    return 'UN'
  }
}


export function getDateArray(days) {
  const currentDate = new Date();
  const dateArray = [];
  for (let i = days - 1; i >= 0; i--) {
    const date = new Date(currentDate);
    date.setDate(date.getDate() - i);
    const formattedDate = formatDateArray(date);
    dateArray.push(formattedDate);
  }
  return dateArray;
}

export function formatDateArray(date) {
  const day = date.getDate().toString().padStart(2, '0');
  const month = (date.getMonth() + 1).toString().padStart(2, '0');
  return `${month}/${day}`;
}


export function get24HourTimeArray() {
  const timeArray = [];
  for (let hour = 0; hour < 24; hour++) {
    const formattedHour = hour.toString().padStart(2, '0');
    timeArray.push(`${formattedHour}:00`);
  }
  return timeArray;
}
